Low-Cost Online Uninterruptible Power Supply with Input Power Factor Correction and Wide Input Voltage Range

2020 ◽  
Author(s):  
Vladimir Burlaka ◽  
Sergey Gulakov ◽  
Svetlana Podnebennaya ◽  
Ekaterina Kudinova
Keyword(s):  
Power Factor ◽  
Power Supply ◽  
Power Factor Correction ◽  
Low Cost ◽  
Input Voltage ◽  
Input Power ◽  
Uninterruptible Power Supply ◽  
Voltage Range ◽  
Uninterruptible Power

The Three-Level Sine-Wave Inverter with Power Factor Correction (PFC)

2015 ◽  
Vol 781 ◽  
pp. 402-405
Author(s):  
Napat Krachangchaeng ◽  
Sakorn Po-Ngam
Keyword(s):  
Power Factor ◽  
Output Voltage ◽  
Power Factor Correction ◽  
Sine Wave ◽  
Input Power ◽  
Small Current ◽  
Uninterruptible Power Supply ◽  
Current Harmonics ◽  
Electric Device ◽  
Uninterruptible Power

Nowadays, the uninterruptible power supply (UPS) is important in reliability for electric device. The UPS need high quality electricity. Therefore, the simulation of the three-level sine-wave inverter with power factor correction (PFC) is proposed in this paper. Moreover, the circuit’s guidelines of the active PFC controller in the active PFC and the sinusoidal output voltage are also presented. Validity of the proposed the three-level sine-wave inverter with the active PFC is confirmed by simulation. The simulation results show the very small current harmonics, the input power factor most nearly unity and constant output voltage when the suddenly step-load changed.

A novel uninterruptible power supply system with active power factor correction

2002 ◽  
Vol 17 (3) ◽  
pp. 405-412 ◽  
Author(s):  
N. Vazquez ◽  
C. Aguilar ◽  
J. Arau ◽  
R.O. Caceres ◽  
I. Barbi ◽  
...  
Keyword(s):  
Power Factor ◽  
Power Supply ◽  
Power Supply System ◽  
Power Factor Correction ◽  
Active Power ◽  
Supply System ◽  
Uninterruptible Power Supply ◽  
Uninterruptible Power

A Single-Stage DC Uninterruptible Power Supply

2015 ◽  
Vol 764-765 ◽  
pp. 466-470
Author(s):  
Maoh Chin Jiang ◽  
Bing Jyun Shih
Keyword(s):  
Power Factor ◽  
Power Supply ◽  
Output Voltage ◽  
High Efficiency ◽  
Low Cost ◽  
Single Stage ◽  
Normal Operation ◽  
Uninterruptible Power Supply ◽  
Sinusoidal Input ◽  
Uninterruptible Power

A single-stage DC uninterruptible power supply (UPS) is proposed in this paper. Basically, the proposed converter is an integration result of a power factor correction circuit with a dc-to-dc converter to achieve simple hardware circuit, high efficiency, and low cost for extra UPS function. Under normal operation, a novel two-switch SEPIC converter operates as an ac to dc converter with sinusoidal input current, unity power factor, and low ripple dc output voltage, and as a battery charger if a battery is added. Since both the input boost supply and the output supply can be controlled independently, a fast transient response can be maintained at both the input for active current wave shaping and at the output for good output regulation. When the ac source is in an outage condition, the proposed converter functions as a dc-to-dc buck-boost converter; therefore, the desired dc output voltage can be provided. Finally, some experimental results are presented for verification.

The Fundamentals of Power Factor Correction

1994 ◽  
Vol 31 (3) ◽  
pp. 213-229 ◽  
Author(s):  
W. G. Hurley
Keyword(s):  
Factor Analysis ◽  
Power Factor ◽  
Power Supply ◽  
Power Factor Correction ◽  
Input Power ◽  
Full Wave ◽  
Voltage Ripple ◽  
Correction Technique ◽  
Switching Mode ◽  
Diode Current

The fundamentals of power factor correction The fundamental issues of power factor analysis for non-sinusoidal waveforms are described. A full-wave rectifier circuit is analysed and original approximations are derived for voltage ripple, peak diode current and input power factor. A power factor correction technique, based on a switching mode power supply, is presented.

scholarly journals Self-oscillating Electronic Ballast With Universal Input Voltage Range And Power Factor Correction

2013 ◽  
Vol 18 (2) ◽  
pp. 972-981
Author(s):  
Juliano de Pelegrini Lopes ◽  
Maikel Fernando Menke ◽  
William Alegranci Venturini ◽  
Fábio Ecke Bisogno ◽  
Álysson Raniere Seidel
Keyword(s):  
Power Factor ◽  
Power Factor Correction ◽  
Input Voltage ◽  
Voltage Range ◽  
Electronic Ballast

scholarly journals DC UPS for Critical Loads

2015 ◽  
Vol 5 (2) ◽  
pp. 231
Author(s):  
Ganesh S ◽  
Chiranjit Ghosh T ◽  
Kokilasree R ◽  
Nandhakumar M ◽  
Md Haroon Alim T
Keyword(s):  
Power Supply ◽  
Low Cost ◽  
Uninterruptible Power Supply ◽  
Critical Data ◽  
Power Failure ◽  
Switching Losses ◽  
Dc Power ◽  
Full Power ◽  
Switched Mode Power Supply ◽  
Uninterruptible Power

<p>The usual way to avoid a computer shutdown during a mains failure is to connect an  uninterruptible power supply system (UPS), which can be suitably modified and fitted inside the computer cabinet by the use of proposed methodology known as a dc UPS.  Conventional desk top UPS systems store electricity in form of chemical energy in batteries and when ever mains fail the batteries provide DC power which is then converter to ac by inverter and then fed to the computer in order to save critical data.  Thus power from mains or from UPS is fed to switched mode power supply unit which converts it to dc to  supply the computer motherboard and accessories.  Leaving the case of the computer powered by mains, duing power failure the dc power is unnecessarily converted to ac and then to dc again in SMPS hence high switching losses and heat is produced there by making the entire system very lowe efficient.  In this work it is proposed to directly feed the dc power from the battery to the computer SMPS system by building a UPS arrangement within the computer system.  This not noly saves space, it is highly efficient compared to the conventional ups system, easy to carry, low cost and reliable since there is no change over operation is required/.  A complete design of an ac to dc power supply with an internal dc UPS is presented in this paper. . A prototype has been fully developed and tested as a PC power supply. Thus the result is achieved at full power about 6-8 minutes.</p>

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